Implement for holding sickle-bars



(No Model.)

Patented Nov. 26, 188 9.

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UNITED STATES PATENT OEFIcE.

JAMES CIIRISTY GENTRY, OF MONROE CITY, MISSOURI.

IMPLEMENT F OR HOLDING SICKLE-BARS.

SPECIFICATION forming part of Letters Patent No. 415,712, dated November26, 1889.

Application filed August 10, 1889. Serial No. 320,402. (No model.) i

To all whom it may concern.-

Be it known that I, JAMES CHEIs'rY GEN- TRY, a citizen of the UnitedStates, residing at Monroe City, in the county of Monroe and State ofMissouri, have invented a new and useful Implement forHoldingSickle-Bars, of which the following is a specification.

This invention has relation to an implement to be used in holdingsickle-bars during the operation of sharpening the teeth of the same,and among the objects in view are to provide a simply and cheaplyconstructed hand device adapted to grip the sickle-bar and hold the sameat a desired angle during the operation of grinding the teeth or bladesthereof.

ith these general objects in view the invention consists in a handle theforward end of which terminates in a rigid plate having a set-screw, andin rear of the plate in a'central transverse bearing-shoulder andopposite inclined similar shoulders, and, furthermore, in an adjustableclamping-plate and set-screw designed to cooperate with the rigid plateand thus grip a sickle-bar in a manner adapted to present any of theangular or transverse surfaces of the knives'of the same in a propermanner to the grindstone.

Referring to the drawings, Figure 1 is a perspective ot' a deviceconstructed in accordance with my invention; Fig. 2, a plan of the samein position upon the sickle-bar, the three posit-ions being indicated bydotted lines. Fig. 3 is a detail in perspective of the movableclamping-plate; Fig. 4, a detail in plan of the device, the movableclamping-plate being detached' Fig. 5 is a longitudinal section takencentrally through Fig. 1, but showin g the sickle-bar in place.

Like numerals of reference indicate like parts in all the figures of thedrawings.

In practicing my invention, for the purpose of economy and facility inmanufacturing the same, I prefer to cast the handle, rigid clamping jawor plate, and shoulders in a single piece or casting, but do not limitmy invention to such a construction.

1 represents the handle, of a convenient size and shape to be gripped bythe hand of the operator, and the same merges into an enlarged head 2.One transverse half of the head is removed and the remainder forms arigid clamping-plate 3, and is provided with a threaded opening a, inwhich is mounted a set-screw 5. The end or shoulderof the head isprovided with a central bearing-surface G at a direct right angle to thelongitudinal length of the device, and at each side in rear-\vardly-inclined bearing faces or shoulders S. A threaded opening 9 ismade through the head, and upon the head and over the opening is mountedan L-shaped clamping-plate 10, the L end terminating over the rigidclamping-plate, or, in other words, occurring at the extremity of thedevice, and the shank of the plate being longitudinally slotted, as at11, and registering with the threaded perforation in the head,'andadjustable thereover by means of a thumb-screw 12, the threaded end ofwhich terminates in the threaded opening in the head after passingthrough the slot in the L-shaped plate.

13 represents the sickle-bar of ordinary construction, and 14 thecutters or knives.

The manner of using my invention when it is desired to grind the knivesis as follows: The L-shaped plate is first adjusted to a position withrelation to the shoulders to adapt the insertion of the sickle-barbetween its L end and anyone of its shoulders or bearingfaces, as it iswell known that the various makes of sickle-bars vary in proportions.

Having adjusted the device for the width of the sickle-bar, it nowsimply becomes necessary to adjust the device to the thickness.

This is done by operatingthe thumb-screw in the rigid clamping-plate.

It is apparent that the handle may be swung from right to left, or viceversa, to assume the different positions shown by dotted lines in Fig.2, and in this mannerpresent the oppositely disposed angular edges ofthe knives in a convenient and proper manner to the grindstone, theadjustment to the right or left merely requiring a loosening andresetting of the thumb -screw in the rigid clamp, and also, if desired,in the similar operation of the thumb-screw and the L-shaped clamp, saidL-shaped clamp being swung to right or left, so that its L end embracesand rigidly retains the cutter-bar.

Having described my invention, what I claim is 1. A hand device of thecharacterdescribed,

comprising a head having a shoulder and extended beyond the same to forma clampingplate, and an L-shaped plate adj ustably mounted on the headand having its L end occurring opposite the first-mentioned plate,substantially as specified.

2. A device of the class described provided with a head terminating in ashoulder, a laterally and longitudinally adjustable clamping-arm mountedon the head in rear of the shoulder, and an opposite rigid clamping-armextended beyond the shoulder, and set-screws mounted in each arm,substantially as specified.

3. A device of the class described terminating in a rigid clamping-arm,and an adjustable clamping-arm, and intermediate oppositely-inclinedbearingshoulders, substantially as specified.

4. The herein-described sickle-bar holder, consisting of a handle havinga thickened head terminating in oppositely-inclined and intermediatebearing-shoulders and extended beyond the same to form a perforatedrigid clamping arm or plate, and provided with a set-screw and anL-shaped slotted adjustable clamping-plate mounted at the opposite sideof the head, and a set-screw passing through the slot and terminating inthreaded openi n in the head, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

JAMES CHRISTY GENTRY.

Vitnesses:

E. M. TULLY, S. J. OWEN.

